Lasting-jack



R. B. SCOTT.

LASTING JACK.

APPLICATION FILED OCT. 8. 1919.

1,389,846. PatentedSept. 6, 192-1.

v UNITED STATES PATENT OFFICE.

REID B. SCOTT OF NAUGATUCK, CONNECTICUT, ASSIGNOR TO THE GOODYEARS METALLIC RUBBER SHOE COMPANY, A. CORPORATION OF CONNECTICUT.

LASTING- JACK.

Specification of Letters Patent.

Patented Sept. 6, 1921.

To all whom it may concern:

Be it known that I, REID B. Soorr, a citizen of the United States, and a resident of Naugatuck, county of New Haven, and State of Connecticut, have invented certain new and useful Improvements in Lasting-Jacks, of which the following is a full, clear, and exact description. 7

My invention relates to last holding devices so constructed as to permit the last to be readily swung to any position desired, the said devices firmly holding the last in its adjusted position, so as to enable the operator to readily lay the parts of the shoe about the last with a minimum of effort and time.

The invention will be understood by reference to the accompanying drawings in which:

Figure 1 is a side elevation, partly in sectiogll, of a jack embodying the improvements, an

Fig. 2 is a sectional detail view illustrating the clamping means for the lastholding ball.

The embodiment of the invention illustrated in the drawings comprises a table 1, upon which is mounted a clamping frame 2 for a ball 3, the latter carrying the usual last-pegs d. The clamping frame is provided with a socket to receive the ball, the socket being surrounded by the annular guide wall 5. A series of arms 6 project upwardly from the clamping frame, the said arms being formed with curved inner faces 6 corresponding with the spherical surface of the ball and of less distance apart than the diameter of the latter.

The second member of the clamp comprises a block 7 formed with a concave upper surface to correspond with the surface of the ball, and disposed immediately below the latter in a recess formed in the table 1. Block 7 is connected to a link 8 which passes through an aperture formed in the table and which is in turn connected with a lever 9 fulcrumed at 10 upon a bracket arm 11 secured to the under surface of the table.

The ball is normally held in fixed position within the clamping frame 2 and against the inner faces of arms 6, by means of a spring 20 which is connected to the rear end of lever 9 and which acts to depress the same. The tension of the spring may be regulated by means of a screw 21 threaded within a bracket 12 and connected at its upper end to the said spring.

Fulcrumed at 13 upon a bracket arm 14, depending from the table l-is a lever 15, the said lever being connected at 16 to a link 17, the latter in turn being connected to the rear end of the clamp operating lever 9. Lever 15 may be operated by a foot treadle 18 through an adjustable link 19.

It will be seen that the downward movement of the foot lever 18 will, through its connections with lever 9 and clamp block 7 withdraw the said block from the ball and permit the latter and the last supported thereon to be turned in any direction, and also to be moved from a vertical position to a horizontal position. The release of the foot lever 18 will permit spring 20 to again act upon lever 9 to elevate clamp block 7 and impart a thrust against the ball 3, the said thrust being resisted by the arms 6, the ball and the last supported thereby being thus held in their adjusted position.

It will be understood that the spring 20 may be of such character as to exert friction upon the ball, by the clamping members, sufficient to hold the ball firmly during the lasting operations, and yet permitting movement of the ball and hence change in the position of the last, without operation of the clamp releasing mechanism. In other words the clamp releasing mechanism might be dispensed with entirely in some instances, such modifications are within the spirit of the invention.

Having thus described my invention, what I claim and desire to protect by Letters Patent is:

l. A last jack comprising a casing constituting the upper member of a clamp, a ball within said casing having means for engaging and supporting a last, a ball-engaging member below said ball and adapted to frictionally engage the same and a resilient member acting to move said ball-engaging member upwardly to clamp the ball against a member of the casing.

2. A last jack comprising a last-holding ball, confining means for said ball, a ballengaging member having a recessed portion coacting with said ball, and a resilient member acting upon the ball engaging-member to clamp the ball against said confining means.

3. A last jack comprising a device having means for retaining a last, confining means for said device, a supportfor said device, and a resilient member acting upon said sup port to clamp said device against the said confining means.

LA last jack comprising a last-holding ball, a rigid frame embracing the said ball, a movable support for the ball having a recessed portion coacting therewith; and a resilient member acting upon said support to clamp the ball against the said frame.

5. A last jack comprising a universally r0- tatable last-holding ball, a frame embracing said ball and constricted at its upper end so as'toform one member of a clamping device for the ball, a, block frictionally engageable WithSELiCi ball and adapted as the second member of said clamping device, a spring acting to press said block against the ball, and means adapted to relieve the block from the action of said spring.

6. A last jack comprising a last-holding ball, a frame embracing the ball and adapt ed at its upper end as one member of a clamp therefor, a block movable below the ball and adapted as a second clamping member therefor, a spring normally pressing the block into frictional engagement with the ball, and means for moving the block against the tension of said spring.

7 A last jack comprising a universally rotatable last-holding ball, a frame formed as one member of a ball clamp, a block dis-- posed within the frame forming the second member of said clam and having a concaved surface adapte to contact with and frictionally retain the ball in any adjusted position, a spring normally pressing the block against the ball and means for retracting the block against the tension of said spring comprising a foot lever.

Signed at Naugatuck, Connecticut, this 29 day of Sept. 1919.

REID B. soor'r. 

